.poster-main{position:relative;width: 800px;height: 270px;}
.poster-main .poster-btn{position: absolute;top: 0;width: 100px;height: 270px;z-index: 10;opacity: 0.8;cursor: pointer;font-size: 50px;text-align: center;color: #ccc;}
.poster-main .poster-btn:hover{color: #fff;}
.poster-main .poster-prev-btn{left: 0}
.poster-main .poster-next-btn{right: 0}
.poster-main .poster-list .poster-item{position: absolute;top: 0;left: 0;}
.poster-list .poster-item a,.poster-list .poster-item img{display: block;}